Home / 21,128.16-29,156.02-11,696.52

Finding the Fourth Proportional to 21,128.16, 29,156.02 and 11,696.52

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Solution

The fourth proportional to 21,128.16, 29,156.02 and 11,696.52 is: 16,140.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.16 : 29,156.02 = 11,696.52 : x
  2. Step 2: Convert to fraction form
    21,128.16/29,156.02 = 11,696.52/x
  3. Step 3: Cross multiply
    21,128.16x = 29,156.02 × 11,696.52
  4. Step 4: Simplify right side
    21,128.16x = 341,023,971.05
  5. Step 5: Solve for x
    x = 341,023,971.05/21,128.16
  6. Step 6: Final answer
    x = 16,140.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.